Phone numbers in Marietta, Ohio
Marietta has 18 phone prefixes in area codes 220, 740.
Biggest holders: Verizon Wireless, AT&T (local phone), T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 44%
- Local phone company 22%
- Internet / business phone carrier 28%
- Phone company 6%
Every prefix in Marietta
Search the first six digits of a number in this list. If it's here, the number started in Marietta with the carrier shown. If it isn't, check the Ohio page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 220-276 | Onvoy | Internet / business phone carrier | 2025 |
| 220-499 | Fractel | Internet / business phone carrier | 2021 |
| 740-236 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 740-336 | Verizon Wireless | Mobile carrier | 2002 |
| 740-350 | AT&T Mobility | Mobile carrier | – |
| 740-371 | Csc Voice | Internet / business phone carrier | 2013 |
| 740-373 | AT&T (local phone) | Local phone company | – |
| 740-374 | AT&T (local phone) | Local phone company | – |
| 740-376 | AT&T (local phone) | Local phone company | – |
| 740-434 | First Communications | Phone company | 2002 |
| 740-516 | Verizon Wireless | Mobile carrier | – |
| 740-525 | Verizon Wireless | Mobile carrier | – |
| 740-538 | Verizon Wireless | Mobile carrier | 2007 |
| 740-568 | AT&T (local phone) | Local phone company | – |
| 740-629 | AT&T Mobility | Mobile carrier | 2001 |
| 740-706 | T-Mobile (including Sprint) | Mobile carrier | – |
| 740-760 | Bandwidth | Internet / business phone carrier | 2012 |
| 740-885 | Teleport Communications America | Internet / business phone carrier | 2007 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.